Machine for forming shanks and collars on drill-steels.



A. A. HENTZELL.

MACHINE FOR FDRMING SHANKS AND COLLARS 0N DRILL STEELS.

APPLICATION FILED NOV. 3. i915.

@Lx/@MM A TTrm wml@ A. A. HENTZELL.

MACHINE FOR FORNHNG SHANKS AND COLLARS 0N DRILL STEELS.

APPLICATION FILED Nov.3, 1915.

,223,975@ Patented Apr. 24,1917.

2 SHEETS-SHEET 2I Y/ [MII] L? -w-Fmm 5 AZ8/5g/a2` Z0 M6 W I TNESSES: IN I/ EN TOR ATTOR Nw.

.armar irri@- ALFRED A. HENTZELL, or LITTLETON, COLORADO.

MACHINE FOR FORMING SHANKS AND COLLARS DRILL-STEELE.

Specification of Letters Patent.

`Patented Apr. 24, 1917.

Application 'filed November 3,1915T Serial No. 59,348.

To all whom t may concern.'

Be it known that I, ALFRED A. HENTLZELL, a citizen of the United States, residing at Littleton, in the county of Arapahoe and State of Colorado, have invented certain new and useful mprovements in Machines for Forming Shanks and Collars on Drill- Steels, of which the following is a specification.

This invention relates to machines for forming shanks and collars on metal'rods, and its primary object resides in providing a machine of novel construction which operates in conjunction with a power driven impact engine to upset and form a metal rod so as to produce in one operation the collar and shank of drill steels used on roc-k drills and other similar devices.

Othercobjec'ts of'my invention reside in providing in a machine of the character specified, a hand operated vise for holding the drill-steel in place, a dolly or plungerdie of novel construction for forming in conjunction with the vise, the collar and shank of the steel, an improved support for the plunger die which facilitates the removal of the steel before or after the operation is completed, and a novel device for the adjustment of the carrier on which the engine used to drive the. plunger in the operation of the machine, is supported.

Still another object of the invention resides in the provision of novel means for locking the removable bushing of the vise against displacement.

The above and other objects all of which will fully appear in the course of the follow'- ing description, I attain by the mechanism illustrated in the accompanying drawings in the various views of which like parts are similarly designated, and in which- Figure 1 is a side elevation of my improved collar and shank forming machine,

Fig. 2, an end view of the same looking in the direction of the arrow A, Fig. 1,

Fig. 3, a vertical section of the holding and forming element of the machine with the parts thereof adjusted for the removal of the nished product,

Fig. 4, a fragmentary enlarged transverse section along the line 4-4, Fig. 1,

Fig. 5, a section similar to Fig. 3 drawn v'collars and shanks formed in the operation of the same.

Referringmore specifically to the drawings, the reference numeral 2 designates a base or bench upon which the operating mechanism of the machine is assembled.

This mechanism comprises three coperative elements, namely, a vise for locking the drill-steel in place during the operation of the machine, a plunger-die which in the operation forms the collar and shapes the yshank on the steel held in thi first-mentioned element, and a carrier upon which the impact engine employed to actuate the plunger, is supported. l

'Considering the three elements in the above order, the vise 3 consists of a stationary jaw 4 fixed upon the base 2, and a superposed movable jaw 5 which is guided for vertical movement upon a pair of upright standards 6 which are erected upon the base.

A traverse head 7 secured upon the standards, provides at 8 a fulcrum for a bent lever the short arm 9 of which is by means of a link 10 connectedwith the moving jaw of the vise. The opposite arm 'of the lever is extended to provide a handle 12 for moving the jaw 5 toward and from the vfixed jaw on the base 2, and a pin 18 on the head 7 provides a stop which determines the position of the lever and the link when the movable jaw is in its operative position.

The stop 13 is positioned so that the point of articulation of the short arm of the lever and the link which together form 'a toggle joint, is slightly out of alinement with the fulcrum of the lever and the point at which the link is pivoted on the jaw, thereby locking the latter against accidental upward displacement.

A weight 14 which is adjustably held on the handle 12 by a set screw 15, assists by force of gravitation in holding the jaw 5 in its locked position. lThe opposed faces of the two jaws are hollowed to receive the complementary members 16 of a bushing which are secured by means of keys 17 and nuts 18.

The parts of the bushing are enlarged at their outer ends and the keys which are curved longitudinally, occupy registering annular grooves vin the inner faces of the said enlargements and the shoulders in the hgllows of the jaws against which said faces a ut.

The keys have at one of their extremities, laterally extending studs 19 which occupy correspondingly formed sockets in the grooves of the jaws to lock the parts in their proper relative positions.

The nuts 18 which hold the bushing against outward movement within the hollows of the jaws, are screwed upon studs 20 on the latter against washers 21a which engage the outer faces of the jaws and those of the respective members of the bushing.

The members of the bushing are concaved to provide conjointly a clamping surface 21 shaped to it the drill-steel, an enlarged cylindrical socket 22 to receive the end of the reciprocating plunger-die hereinafter to be described, and in the shoulder formed at the juncture of the socket with the surface 21, a recess 23 in which the metal of the drillsteel is upset to form the collar of the finished product.

The clamping surface 21 of the vise is formed to correspond cross-sectionally with the shape of the drill-steel and may accordingly be cylindrical or multilateral.

The sockets 22 of the same are preferably cylindrical and the recesses 23 are either circular or angular in accordance with the shape of the collar to be formed on the steel.

In this connection it will be observed that the machine may be effectively employed for forming bolt heads and similar enlargements of rods other than those used as drill steels.

The forming or die-element of the machine consists of a preferably exteriorly cylindrical plunger 24 which is slidably fitted in a stock 25 which at 26 is pivotally mounted upon a bearing 27 on the base.

The stock is by means of an integral foot 28 normally supported upon the base 2 in a position in which the plunger 24 is axially in line with the bushing of the vise.

A pin 29 extending inwardly on the stock into a longitudinal groove in the plunger, holds the latter against rotation. The plunger is longitudinally divided into two halves which are hinged as at 30. The hinged members of the plunger are hollowed interiorly to conjointly provide a chamber 31 closed at one end for forming the shank on a drill-steel and to provide at the end of the plunger a recess 32 which in the operation of the machine coacts with the recess in the bushing of the vise to. form the collar of the-drill-steel.

The plunger-die extends at its forward end into the socket 22 of the bushing in which it is continually supported, it being understood that the engagement of the end of its longitudinal slot with the pin 29 on the stock, limits the return movement of the plunger after it has been driven into the socket in the operation of the machine.

The carrier element of the machine consists of a carriage 33 which isslidably mounted on the base 2 and which has suitable means for supporting and securing an impact engine.

The construction of the supporting and securing means is varied in accordance with the type of engine used in connection with the machine, and a more detailed description of these parts is therefore omitted.

While impact engines of different character may be used for the operation of my improved machine, I preferably employ an air-actuated hammer such as is shown at 34 in Fig. 1 of the drawings.

The striking pin 35 of the hammer is axially in line with the plunger-die 24 and is proportioned to enter the stock '25 in which the latter is fitted when by engagement with the rear end of the plunger-die the latter is driven into the recess 22 of the vise.

The short arm 36 of a bent lever fulcrumed at 37 in a bearing below the base, extends into a slot 38 of the carrier 33 while the opposite arm of the lever is extended to provide a handle 39.

By movement of the handle the carrier is moved longitudinally along the base to either separate the striking-pin from the plunger die or move the same into contact with the rearward end thereof.

In the operation of my machine, the drillsteel 40 is in a. red-hot condition placed within the alined vise and plunger-die after the upper jaw of the vise has been raised by movement of the handle 12 in the direction of the arrow B, and after the plunger-die is placed in its rearmost position in the stock determined by the engagement of the forward end of its slot with the pin 29.

After the movable jaw has been lowered' to clamp the steel in place, the carrier 33 is moved forwardly by depression of the handle 39 until the striking pin engages the end of the plunger-die. Actuation of the hammer by motive fluid admitted to the engine, drives the plunger-die forwardly, with the result that the steel 40 abutting against the breast 41 at the end of the plunger-chamber, is upset within the complementary recesses 82 and 23 of the plunger-die and the vise to form the collar 42 of `the drill while the portion of 'the steel Within the plunger is shaped to form the shank 43 of the same.

After the operation is completed, the upper jaw of the vise is again raised and the steel is removed by turning the upper half of the plunger-die about its pivot as shown in F ig. 3 of the drawings.

In case the ready removal of the steel is obstructed by reason of an incomplete formation of the collar on a cooled steel, or other circumstances, the steel may be adi justed to a position in which it is entirely free for longitudinal movement, by turning the plunger-stock about its pivot as illustrated in F ig. 6.

The simplicity of the machine, in construction and operation adapts it for use at mines and other points remote from a machine shop to shape drill steels and the like according to any desired form.

The construction of the plunger-die greatly facilitates the removal and adjustment of the steel under any circumstances,

and the hand operated vise permits of operating the machine at places where .the use of a power driven machine would be impractical.

Having thus described my invention what I claim and desire to secure by Letters-Pat- .ent is:

i like, of a vise for holding the drill-steel in place during the forming operation, including coperative aws, complementary bushing-parts on said jaws, locking-keys occupying registering grooves in opposite faces of the jaws and the respective bushingparts, and means for securing the bushingparts against longitudinal displacement.

2. In a machine of the character described, the combination with a movable plunger-die for forming a drill-steel or the like, of a vise for holding the drill-steel in place during the forming operation, including cooperative jaws, complementary bushing-parts on said jaws, and means for securing the said parts against displacement, including curved keys in registering circular grooves in opposite faces of the jaws and the respective bushing-parts, the said keys having lateral studs occupying recesses in the said grooves.

3. In a machine of the character described, the combination with a vise for holding a drill-steel or the like in place during a forming operation, of a stock, a plunger-die for forming the drill-steel, supported for movement in said stock and in a socket of the vise, and a pin on said stock in a slot of the die for limiting the movement of the die in one direction.

et. In a machine of the character described, the combination with a vise for holding a drill-steel or the like in place during a forming operation, of a pivoted stock, and a plunger-die for forming the drillsteel, movably supported thereon, the said stock having a foot to support it in a position in which the plunger die is axially in line with the steel-receiving hollow of the vise.

5. In a machine of the character described, the combination with a movable plunger-die for forming a drill-steel or the like, and a vise for holding the drill-steel in place during the forming operation, of a carrier for the support of an engine in actuative relation to the plunger-die, and a hand-lever fulcrumed at a suitable point in operative connection with said carrier.

6. In a machine of the character described, the combination with a reciprocating plunger-die for forming a drill steel or the like, of a vise for holding the drillsteel in place during the forming operation including fixed and movable jaws, a carrier for the support of an engine in actuative relation to the plunger dic, and devices to manually move the said Carrier and the movable jaw of the said vise.

7. In a machine of the character described, the combination with a movable plunger-die for forming a drill-steel or the like, of a vise for holding the drill-steel in place during the forming operation, said vise including a fixed aw, a vertically movable jaw, a toggle joint, a lever for operating the movable aw through the intermediary of the toggle-- joint, and a stop engaging the toggle joint when the movable jaw is in its operative position relative to the fixed aw, said lever being positioned relative to its fulcrum to maintain the parts in their said operative positions by force of gravitation.

8. In a machine of the character described, the combination with a movable plunger-die for forming a drill-steel or the like, of a vise for holding the drill-steel in place during the forming operation, said vise including a fixed jaw, a vertically movable jaw, a togglejoint, a lever for operating the movable jaw through the intermediary of the togglejoint, a stop engaging the toggle joint when the movable aw is in its operative position relative to the fixed jaw, and a weight on the lever, said lever being positioned relative to its fulcrum to maintain the parts in their die disposed to engage a drill-steel held in said vise and longitudinally divided into complementary members which are separably mounted for facilitating the removal of a drill-steel from within the plunger-die.

10. In a machine of the character described, the combination with a vise for holding a drill-steel or the like in place during a forming operation, of a movable hollow plunger-die longitudinally divided into complementary members which are separably mounted to facilitate the removal of a drillsteel from within the plunger-die.

11. In a machine of the character described, the combination with a socketed vise for holding a drill-steel or the like in place during a forming operation, of a hollow plunger-die coperative with saidvise, and a stock upon which said plunger-die is slidably supported, said stock being pivoted for upward movement or the plunger-die to facilitate the removal of a drill-steel from the vise.

12. In a machine of the character described, the combination with a socketed vise for holding a drill-steel or the like in place during a forming operation, of a hollow plunger-die coperative with said vise, and longitudinally divided into complementary sections which are separably mounted, and a stock upon which said plunger-die is slidably supported, said stock being pivoted 'for upward movement of the plunger-die to plimger-die slidably supported on said stock p and in the socket or' the vise.

14. In a machine of the character described, the combination with a socketed vise for holding a drill-steel or the like, of a stock pivoted for movement about a hori zontal axis, and a horizontally movable plunger-die slidably supported on said stock and in the socket of the vise, said plunger die being longitudinally divided into com plementary sections separably mounted to facilitate the removal of a drill-steel from between them.

15. In a machine of the character de scribed, the combination with a vise for holding a drill-steel in place during a fornr ing operation, of a movable plunger-die disposed to engage a drill-steel held in said vise and pivoted for movement about an axis transverse to its operative movement.

In testimony whereof I have aiiXed my signature in presence of two witnesses.

ALFRED A. HENTZELL. Witnesses:

G. J. ROLLANDET, L. RHoADEs.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

